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  • How do i pipe data to gnuplot/no-fifo and plot the data on the fly

    From Veek M@21:1/5 to All on Sun Feb 16 02:18:54 2020
    my output is

    42.0 27.8 29.8 43.0 42.0 43.0
    42.0 27.8 29.8 43.0 42.0 43.0

    while true; do
    sensors|egrep -o ' \+[0-9]{2}\.[0-9]+°C '|tr -d ' +°C'|tr -s '\n' ' ';
    echo; sleep 1;
    done|gnuplot -p -e '
    set xrange [0:60];
    set yrange [20:80];
    while (1) {
    plot "-" using 1:2, "" using 1:3; pause 1; reread;
    }'

    just blocks.
    while true; do sensors|egrep -o ' \+[0-9]{2}\.[0-9]+°C '|tr -d ' +°C'|tr -
    s '\n' ' '; echo; sleep 1; done|gnuplot -p -e 'plot "-" using 1:2, ""
    using 1:3'

    So I tried
    echo 20 40 60|gnuplot -p -e 'set xrange [0:60]; set yrange [20:80]; plot
    "-" using 1:2, "" using 1:3'
    line 1: warning: Skipping data file with no valid points

    why is that?

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  • From Gavin Buxton@21:1/5 to All on Sun Feb 16 05:59:31 2020
    Sorry, tbh I'm not following. Usually I dump data to a file and pipe commands to gnuplot to plot the file. That's pretty easy to do, if that would help?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Veek M@21:1/5 to All on Tue Feb 18 14:42:17 2020
    ( seq 1 10 )|gnuplot -p -e 'set xrange [0:100]; set yrange [0:100];
    while(1) { plot "<&3" using ($0):1 every ::::3:0; pause 10; replot; }' 3</ dev/stdin

    Something like this works but only just.. basically you got to manually
    pipe the data using some gnuplot specific syntax not to mention the
    redirect to fd in bash
    plot "<&3"

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)